Mechanical Seal Style RB

Single Rotating Welded Metal Bellows Cartridge with Circulation Gland

Mechanical Seal Style RB


  • Part of Flexaseal’s integrated/platform single cartridge seal design
  • Patented (Patent Number US 7,979,986) Plunger-Lock drive
  • Only two static O-rings – cost savings are substantial when perfluorelastomers are required
  • Rotating welded metal bellows are self-cleaning during operation
  • Simple cartridge seal installation – slide seal onto the shaft, bolt to box face, tighten set screws, and remove spacers
  • Hydraulically balanced design
  • No moving elastomers. No fretting – No hang-up
  • Minimal number of parts. Simple design means fewer pieces to cause problems
  • Metric sizes readily available
  • Sleeve is isolated from product
  • Quick inexpensive repairs

RB3 with Circulation, Vent & Drain Gland

  • All the benefits of the RB design plus vent and drain gland with throttle bushing
  • Pipe connections are made to different sizes to assure that correct piping plans are employed
  • Cost-effective upgrade


Operating Parameters

Max Temp: 400°F (204°C)
Max Pressure: 300 PSI (20 bar)
Max Speed: 4500 FPM (22 m/sec)

Note: Max Temperature / pressure / speed indicate operating extremes independently and do not imply the seal will function at these extremes at the same time. Contact Flexaseal Engineered Seals and Systems, LLC if in doubt.


Quote Request

Depending on your specific needs and application, Flexaseal can help you identify the ideal products. Contact us to tell us about your needs and request a quote.